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(: Test: K-dateTimesSubtract-6                           :)
(: Written by: Frans Englich                             :)
(: Date: 2007-11-22T11:31:21+01:00                       :)
(: Purpose: The '-' operator is not available between xs:dayTimeDuration and xs:dateTime. :)
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xs:dayTimeDuration("P3D") - xs:dateTime("1999-08-12T08:01:23")